Vapor-stove.



N0. 1694,|73. Patented. Feb. 25, |902.

J. P. NEWBLD.

vAPon s'TovE.

(No Model.)

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UNITED STATES PATENT EEIcE.

J OIIN P. NEWBOLD, OFSPHILADELPHIA, PENNSYLVANIA.

`VAPOR-stove.

SPECIFICATION forming part of Letters Patent No. 694,173, dated February 25, 1902.

Application led October l0,1900. Serial No. 32,641. (No modeli l To @ZZ whom it may concern:

Be it known that I, J oHN-P. NEwBoLD, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Vapor-Stoves, of which the following is a specification.

My invention relates to certain improvements in oil-stoves of the type in which the liquid fuel is forced from an aperture in the burner under pressure, and more particularly to improvements in the detail mechanism of the same.

The object of my invention is to provide a stove of the above character which shall be easily kept in order and the parts of which can be conveniently cleaned. This object I attain as follows, reference being had to the accompanying drawings, in which- Figure 1 is a side view of my improved vapor-stove. Fig. 2 is a plan view of the same; and Fig. 3 isa sectional View on the line 3 3, Fig. 2, showing the details of the valve mechanism and the supply-pipe.

A is the body and at the same time the reservoir of the stove, having supporting-brackets B. These extend under and serve to support the body and are also soldered to it alongl the surfaces of contact. They are extended above the stove and are bent over, as shown at b', in order to hold a cooking vessel above the stove.

D is a burner, the top of which is slightly below the plane of the highest points of the bracketsB, and consists of a cylindrical piece d, preferably brazed to the top of a tube C and tapped at one end for a burner-tip d', in which is the ordinary small orifice. Arms c, attached at their lower ends to the piece d, support a dished ring or crown-piece d2, on which is the detachable dame-deliector E.

The burner-tube C extends through the reservoir, to which it is brazed or soldered at e and e. Secured to the lower portion of the reservoir is a gland-piece h. Passing through the gland h and the tube C is a valve-stem II, having a needle-point at its Vupper end constructed to iit the hole in the burner-tip d. This stem is threaded at t', where it passes through a guide-piece c', and at its lower end has a handle or lever H', held to it bya screwj. This lever is limited in length, as it is intended to be moved in a circle about the valvestem without interference from the brackets or legs B.

In order that the gland h may be securely heldin position, I preferably construct it with aprojecting portion extending into the reservoir, this portion thenbeing engaged by the lower end of the tube C, which is brazed or otherwise suitably attached to it.

The tube C is provided with a series of openings n for the admission of oil on its way to the burner, these being as near as possible to the bottom of said tube, above the inwardlyprojecting end of the gland h. It will at once be noted that with the openiugsinto the tube placed above the bottom of the reservoir it would be impossible to utilize all of the oil therein, since no oil below the level of said openings could be forced out of the reservoir.

In place of making passages through the end of the gland which would connect the interior of the tube with the lowest portion of the reservoir I preferably fix a hood or collar in to said tube at a point just above the holes n, as shown, allowing the lower edge of said hood to extend downwardly to within a small distance of the bottom of the reservoir. This construction makes it possible for the gas pressing upon the surface of the oil in the reservoir to continue its action until the level of said oil had fallen to the lower edge of the collar or hood m. z

At the end of the burner-tube C are a series of orices n, through which oil may gain access to the interior of said tube, which has a hood m around its lower end, as shown.

An opening in the top of the reservoir is threaded, as indicated in Fig. 3, and constructed to screw into it is the cap 1o, having its head flanged and extended to form a handle p'.

In vapor-stoves of the type shown and described it has been the common practice to provide means for limiting the height'of oil in the reservoir. This has been done by hav ing a llingtube extending to a point slightly above the body of the reservoir; but we dnd that this is objectionable on the ground that the reservoir cannot be cleaned, and the sedi-l ment soon clogs the small openings in the burner-tube.

By making the feed-opening communicate directly with the upper portion of the reserA IOO voir the reservoir can be readily cleansed. A gasket between p and the reservoir serves to make a perfectly tight joint.

The upper portion of the reservoir has a circular depression g, forming a cup for the iiuid for heating the burner and the air above the burning iuid in the reservoir.

A circular heat-conducting or baflie plate r is attached directly under the top plate of the reservoirand is also attached to the burnertube. This plate is of copper or other suitable material and is of such diameter that there is an annular space s between its outer edge and the inside edge of the slanting offset in the top of the reservoir. This plate is cut on radial lines, and the sections are slightly bent. By means of this plate the air above the liquid is more readily heated.

The use and operation of my improved stove is as follows: rIlhe cap p is removed, and kerosene is put into the reservoir through the opening until it is about one-third full. The cap is now replaced, and the cup-like depression g is filled with fluid-such as alcohol, naphtha, or some similar inflammable substance-which is ignited. As this substance burns it heats the burner D after the manner common to stoves of this type, and at the same time it also heats the burner-tube, the top of the reservoir, the conducting-plate, and consequently the air contained in the reservoir. The effect of this is to expand the air in the reservoir, exerting pressure on the surface of the oil, and when the burner has been heated sufficiently the lever-arm H is turned in a direction to open the needlevalve in the burner-tip CZ. The expanded air now forces the oil under the hood rmJ into the openings n, up the burner-tube, and out the hole in the burner-tip in a fine spray or vapor. Since this action takes place before the liquid in the cup g is burned out, the oil is ignited and the blue flame forming around the crown d2 and the distributer E heats any object placed in the proper position. It has been found that by only filling the reservoir with oil to one-third of its capacity enough air will be imprisoned above the liquid poured into this level to completely expel all of said liquid when said air is expanded by the heat,

at first from the burning alcohol and after the stove is running from the hot burner and baffle-plate. If at any time it is desired to shut down the stove, thelever II is turned sufficiently to shut off the oil-supply passing through d.

I claim as my inventionl. The combination of a reservoir, a tube extending through the same having aburner at its upper end, a valve and valve-rod in the tube, said tube having openings for the intake of liquid fuel and having ahood xed to its outside surface and extendingbelow said openings, substantially as described.

2. The combination of a reservoir, a tube extending through the same having a burner at its upper end, a valve and a valve-rod in the tube, a gland for the valve-rod in the bottom of the reservoir, the, same extending into the tube, said tube having openings in its sides above the inwardly-extending portion of the gland, a hood encircling the tube, having its lower edge extending below the level of the openings in said tube, substantially as described.

3. The combination of a reservoir, :a tube extending through the same havinga burner atits upper end, a stuffing-box extending into said tube, a valve-rod extending through said stuffing-box controlling the flow of iiuid from the burner, said tube having an annular hood encircling the tube near its lower end, the lower edge of said hood extendingto within a relatively short distance of the bottom of the reservoir, there being openings in the side of the tube above the inwardly-projecting end of the stuffing-box and below the point of contact of the hood with the tube, substantially as described.

In testimony whereof I have signed my name t0 this specification in the presence of two subscribing witnesses.

Y JOHN P. NEWBOLD.

Witnesses:

WILLIAM E. BRADLEY, Jos. H. KLEIN. 

